#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
	 
	void *print_message_function( void *ptr );
//int pthread_create(void *);
int pthread_create(pthread_t * thread, 
                       const pthread_attr_t * attr,
                       void * (*start_routine)(void *), 
                       void *arg);
	 
	main()
	{
	     pthread_t thread1, thread2;
	     char *message1 = "Thread 1";
	     char *message2 = "Thread 2";
	     int  iret1, iret2;
	 
	    /* Create independent threads each of which will execute function */
	 
	     iret1 = pthread_create( &thread1, NULL, print_message_function, (void*) message1);
	     iret2 = pthread_create( &thread2, NULL, print_message_function, (void*) message2);
	 
	     /* Wait till threads are complete before main continues. Unless we  */
	     /* wait we run the risk of executing an exit which will terminate   */
	     /* the process and all threads before the threads have completed.   */
	 
	     pthread_join( thread1, NULL);
	     pthread_join( thread2, NULL);
	 
	     printf("Thread 1 returns: %d\n",iret1);
	     printf("Thread 2 returns: %d\n",iret2);
	     exit(0);
	}
	 
	void *print_message_function( void *ptr )
	{
	     char *message;
	     message = (char *) ptr;
	     printf("%s \n", message);
	}

